Improvement of the precision of the gradient method and object tracking using optical flow |
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Authors: | Email author" target="_blank">Masanori?SugisakaEmail author Shinobu?Sato |
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Affiliation: | (1) Department of Electric and Electronic Engineering, Faculty of Engineering, Oita University, 700 Dannoharu, 870-1192 Oita, Japan |
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Abstract: | In this study, the spatial local optimization method was improved to obtain high precision of optical flow for cases in which
the object movement changes substantially and a method to trace the loci of moving objects was considered. In the spatial
local optimization method, the precision of the optical flow when the object movement changes substantially becomes a problem.
Therefore, to make the object movement relatively small, we obtained flow vectors from the image sequence to drop the resolution
of the original input image sequence to half the initial resolution. flow vectors were then obtained from the original input
image sequence that were smaller than the threshold value. We show that the precision of the optical flow when the object
movement changes substantially is improved by this method. Method used to trace the loci of moving objects was demonstrated.
We obtained clusters from histograms of flow vectors and pursued each cluster. We show that it is possible to trace moving
objects by this method.
This work was presented, in part, at the 7th International Symposium on Artificial Life and Robotics, Oita, Japan, January
16–18, 2002 |
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Keywords: | Optical flow Flow vectors Image sequence Moving objects |
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